Saccadic initiation biased by fixational activity

Vencato, Valentina; Harwood, Mark; Madelain, Laurent

Document type :

Article dans une revue scientifique

DOI :

10.1016/j.visres.2022.108117

Permalink :

http://hdl.handle.net/20.500.12210/91221

Title :

Saccadic initiation biased by fixational activity

Author(s) :

Vencato, Valentina [Auteur]
Center for Neural Science [New York] [CNS]
Harwood, Mark [Auteur]
University of East London [UEL]
Madelain, Laurent [Auteur]

Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 [SCALab]

Journal title :

Vision Research

Volume number :

201

Pages :

p. 108-117

Publisher :

Elsevier BV

Publication date :

2022-12

ISSN :

0042-6989

HAL domain(s) :

Sciences cognitives

English abstract : [en]

Both the gap and overlap paradigm may reveal the interaction between fixating and moving the eyes, but the effects of the overlap paradigm have not been fully characterized yet. Here we present a series of experiments ...
Show more >Both the gap and overlap paradigm may reveal the interaction between fixating and moving the eyes, but the effects of the overlap paradigm have not been fully characterized yet. Here we present a series of experiments probing how an overlap paradigm, combined with the manipulation of stimuli durations, saliency and transient changes might modulate saccadic reaction time distributions. We recorded saccadic reaction time in four participants in six experiments in which a saccade-target appeared at a pseudo-random amplitude after a fixation period. First, we parametrically manipulated the duration of the overlap using a range of intervals (from 0 to 200 ms). In a second experiment we probed the interaction of various foreperiod intervals (i.e. the duration of the fixation period prior to saccade-target onset) and overlap using two overlap intervals (20 or 140 ms). In two additional experiments we manipulated either the stimuli sizes or their contrast ratio in overlap paradigms (20 or 140 ms). Lastly, we introduced a visual transient during the overlap interval via two manipulations (both with a range of SOA): either a distractor ring appeared around the fixation-target, or a dynamic random noise patch replaced the fixation-target. Results show reliable modifications in the latency distributions depending on the overlap interval as well as idiosyncratic differences. Additional experimental manipulations also affected the latency distributions revealing strong interacting inhibitory processes. We conclude that the effects of overlap intervals may combine with the influence of other stimuli properties affecting decision process.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

European Project :

Horizon 2020 Grant PACE Initial Training Network - Marie Sklodwska-Curie 64296

Administrative institution(s) :

Université de Lille
CNRS
CHU Lille

Collections :

Sciences Cognitives et Sciences Affectives (SCALab) - UMR 9193

Research team(s) :

Équipe Action, Vision et Apprentissage (AVA)

Submission date :

2023-11-22T20:40:11Z
2023-11-23T21:50:14Z
2024-03-14T11:58:50Z

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Version	Link	Modification date
3	20.500.12210/91221*	2024-03-14T11:57:59Z
2	20.500.12210/91221.2	2023-11-23T21:47:51Z
1	20.500.12210/91221.1	2023-11-22T20:40:11Z

Saccadic initiation biased by fixational activity

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Saccadic initiation biased by fixational activity

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